Senior Machine Learning Scientist (Generative AI) - Viator London, England, United Kingdom

About Viator

Viator, a Tripadvisor company, is the leading marketplace for travel experiences. We believe that making memories is what travel is all about. And with 300,000+ travel experiences to explore—everything from simple tours to extreme adventures (and all the niche, interesting stuff in between)—making memories that will last a lifetime has never been easier.

Perks of Working at Viator

• Competitive compensation packages, including base salary and annual bonus.
• "Work your way" with flexibility to suit your lifestyle.
• Flexible schedule promoting work-life balance.
• Donation matching for qualifying charitable donations annually.
• Tuition assistance for qualified programs.
• Lifestyle benefit for personal spending.
• Travel perks including discounts.
• Employee assistance program for life’s challenges.
• Health benefits with great coverage and competitive premiums.

Our Values

• We aspire to lead.
• We’re relentlessly curious.
• We’re better together.
• We serve our customers, always.
• We strive for better, not perfect.
• Our workplace is for everyone.

You will work on:

• Research, prototype, and productionize generative AI models.
• Develop scalable GenAI pipelines that generate high‐quality content.
• Design and evaluate prompt tuning strategies and RAG systems.
• Fine‐tune foundation models and develop domain‐specific adapters.
• Define best practices for model monitoring.
• Understand use cases for Agentic AI and communicate findings.
• Utilize RLHF methodologies to build feedback mechanisms.
• Collaborate cross‐functionally with product, design, and engineering.
• Stay up to date with the latest in GenAI research.
• Design, code, experiment and implement models and algorithms.
• Collaborate with product managers and business stakeholders.
• Investigate and adopt innovative concepts.

To be successful in the role, you’ll need:

• 5+ years of hands‐on data science experience with at least 2 years of experience with LLM.
• Awareness of current LLM techniques, prompt tuning, evaluations and model monitoring.
• In‐depth knowledge of AI/ML/DL, Statistics, and related open‐source libraries.
• Strong skills in SQL and at least one programming language.
• Comfort in code reviews and discussing architecture.
• Experience in deploying online solutions and analysing real‐time results.
• Passion for mentoring junior members of the team.
• Leadership qualities, autonomy, and team collaboration skills.
• Clear communication skills and proactive sharing of findings.

Desired qualifications:

• Master's or PhD in Computer Science, Operations Research, Statistics, or related quantitative disciplines.
• Knowledge in User Modelling, Representation Learning, RecSys, Large Language Models (LLM).
• Prior experience in e‐commerce or at an Online Travel Agency.

Job Location: This role is a remote position or hybrid in the UK or Poland. Occasional travel to company offices as necessary.

If you need a reasonable accommodation or support during the application or the recruiting process due to a medical condition or disability, please reach out to your individual recruiter or send an email to AccessibleRecruiting@Tripadvisor.com and let us know the nature of your request.